本文選題：纖維增強復合材料 + 微切削��； 參考：《哈爾濱工業(yè)大學》2015年碩士論文

【摘要】：纖維增強樹脂基復合材料具有超常的力學和熱學等性能使其在航空、航天、國防以及汽車等高新技術領域得到了廣泛的應用。目前,國外已將纖維增強樹脂基復合材料應用在航空、航天、國防等領域的電子器件,而國內對于這類高端技術領域的產品,基本上處于依賴進口。對纖維增強樹脂基復合材料加工特性的了解與掌控,有助于將這類性能優(yōu)異的材料更加經濟有效地應用于各類工程實際。然而,目前大部分工作集中于從材料學方面研究復合材料的制備和表征,較少研究高應變率條件下的變形和破壞。因此,研究纖維樹脂基復合材料的切削加工特性,將有助于推廣這類高性能材料的在工程實際中的應用。本文基于有限元軟件ABAQUS二次開發(fā),建立基于代表性體積單元的纖維增強復合材料微觀幾何模型,該模型采用錯位法實現復合材料纖維的隨機分布及高體積含量。建立碳纖維增強樹脂基復合材料的材料模型,該模型采用脆性材料模型來模擬碳纖維材料,采用插值法逼近樹脂基體的應力應變關系,采用牽引分離內聚力模型來模擬纖維和基體之間的界面相�；诶w維增強復合材料的幾何模型和材料模型,建立微切削三維有限元仿真模型,對不同切削參數條件下復合材料的微切削過程進行研究,得到切削力隨加工參數的變化規(guī)律;通過對加工表面形態(tài)進行分析,探索增強相和基體的變形機制;研究不同纖維取向對復合材料加工性能的影響,獲得加工表面的形貌變化情況及切削區(qū)域應力傳遞規(guī)律。采用金剛石涂層硬質合金銑刀對碳纖維增強樹脂基復合材料進行微切削實驗,得到不同切削參數條件下的復合材料微切削過程切削力的變化規(guī)律,并對有限元仿真結果進行驗證。對碳纖維增強樹脂基復合材料加工表面質量進行研究,對加工前后表面形態(tài)進行觀察,對加工表面粗糙度進行測量,得到不同切削參數和不同纖維取向對加工表面質量的影響規(guī)律。
[Abstract]:Fiber reinforced resin matrix composites have been widely used in the fields of aviation, aerospace, national defense and automobile due to their excellent mechanical and thermal properties. At present, fiber reinforced resin matrix composites have been used in aerospace, national defense and other fields of electronic devices, but the domestic products of such high-end technology are basically dependent on imports. Understanding and controlling the processing characteristics of fiber reinforced resin matrix composites is helpful to the application of this kind of excellent materials in engineering practice. However, most of the work has focused on the preparation and characterization of composite materials from the point of view of material science, and less on deformation and failure under high strain rate. Therefore, the study of cutting and machining characteristics of fiber resin matrix composites will be helpful to popularize the application of this kind of high performance materials in engineering practice. Based on the second development of finite element software Abaqus, the micro geometric model of fiber reinforced composites based on representative volume element is established in this paper. The dislocation method is used to realize the random distribution and high volume content of composite fiber. The material model of carbon fiber reinforced resin matrix composite was established. The brittle material model was used to simulate carbon fiber material, and the interpolation method was used to approximate the stress-strain relationship of resin matrix. The cohesive force model was used to simulate the interfacial phase between fiber and matrix. Based on the geometric model and material model of fiber reinforced composites, a three-dimensional finite element simulation model of micro-cutting is established. The micromachining process of composites under different cutting parameters is studied, and the variation of cutting force with machining parameters is obtained. By analyzing the morphology of the machined surface, the deformation mechanism of the reinforcing phase and matrix was explored, and the influence of different fiber orientation on the machining properties of the composites was studied. The morphologies of the machined surface and the stress transfer law in the cutting region were obtained. In this paper, diamond coated carbide milling cutter is used to conduct micro-cutting experiments on carbon fiber reinforced resin matrix composites, and the cutting forces of composites under different cutting parameters are obtained. The finite element simulation results are verified. The machined surface quality of carbon fiber reinforced resin matrix composites was studied. The surface morphology before and after processing was observed and the roughness of the machined surface was measured. The effects of different cutting parameters and fiber orientation on the surface quality were obtained.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TB332

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本文編號：2024147